Arm mechanism for a ski exerciser



FIG. 1 is a left front perspective view of the arm mechanism for a ski exerciser showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof, with the arms in an alternate position;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a right side elevational view thereof, with the arms in an alternate position;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view.

The broken line showing of the base is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for an arm mechanism for a ski exerciser, as shown and described. 